Qt之一个鼠标和按键响应事件演示

来源：互联网发布：抢购软件哪个好编辑：程序博客网时间：2024/05/23 19:20

在ui上添加两个控件，分别为lable和pushButton。

在mainwindow.h中添加两个事件：mouseMoveEvent 和 keyPressEvent

实现的功能为：按下键盘z键，显示一张图片

按下pushbutton，显示坐标，并将光标自定义一个图标

代码如下：

//mainwindow.h#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QtWidgets/QMainWindow>#include "ui_mainwindow.h"#include <QMouseEvent>class MainWindow : public QMainWindow{Q_OBJECTpublic:MainWindow(QWidget *parent = 0);~MainWindow();public:void mouseMoveEvent(QMouseEvent *);void keyPressEvent(QKeyEvent *);private:Ui::MainWindowClass ui;};#endif // MAINWINDOW_H//mianwindow.cpp#include "mainwindow.h"MainWindow::MainWindow(QWidget *parent): QMainWindow(parent){ui.setupUi(this);ui.label->setText(tr("push the key: z"));ui.pushButton->setText(tr("try to press the mouse and to move "));}MainWindow::~MainWindow(){}void MainWindow::mouseMoveEvent(QMouseEvent *e){QCursor my(QPixmap("C:/Users/sony/Desktop/practice/1/Win32/Debug/bubble.png"));QApplication::setOverrideCursor(my);int x = e->pos().x();int y = e->pos().y();ui.pushButton->setText(tr("mouse:(%1,%2)").arg(x).arg(y));    ui.pushButton->move(e->pos());}void MainWindow::keyPressEvent(QKeyEvent *e){if(e->key() == Qt::Key_Z){ui.label->setPixmap(QPixmap("C:/Users/sony/Desktop/pic/Lena.jpg"));ui.label->resize(100, 100);}}//main.cpp#include "mainwindow.h"#include <QtWidgets/QApplication>int main(int argc, char *argv[]){QApplication a(argc, argv);MainWindow w;w.show();return a.exec();}